Evaluate Introgression Lines (ILs) of chickpea cultivars JAKI 9218 and JG 16 carrying “QTL-hotspot” for drought tolerance traits at multi-locations

Srinivasan Samineni, Pooran Gaur, Sobhan Sajja. (30/1/2017). Evaluate Introgression Lines (ILs) of chickpea cultivars JAKI 9218 and JG 16 carrying “QTL-hotspot” for drought tolerance traits at multi-locations.

Abstract

•Flowering time of introgression lines (ILs) was in the range of 48-56 d under both rainfed and irrigated conditions. However, the maturity time was prolonged by one week under irrigated conditions (107 d) compared to rainfed conditions (100 d). There was no significant change of average plant height observed in ILs compared to recurrent parents (RP). Seed yield of ILs developed in JAKI 9218 was in the range of 1028-1840 kg/ha under rainfed conditions. Five (13-35%) and eleven (25-43%) ILs showed significantly higher seed yield than respective RPs JAKI 9218 and JG 16 under rainfed conditions (Fig 1a & 2a). Under irrigated conditions 18 (17-48%) and 5 (16-44%) ILs showed significantly higher seed yield than respective RPs JAKI 9218 and JG 16 (Fig 1b & Fig 2b). Interestingly the 100-seed weight of the ILs in JAKI 9218 and JG 16 increased by 8-29% (Fig 3a) and 50-94% (Fig 4a) under rainfed conditions, respectively. Similar trend was observed in irrigated conditions also. It appears that the genomic region controlling several root related traits also harbouring genes controlling seed size, thus most of the ILs showed 100-seed weight similar to seed weight of donor parent ICC 4958.